/*
 * Copyright (c) 2007, 2015, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */
/*
 * Copyright 2005 The Apache Software Foundation.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.sun.org.apache.xerces.internal.util;

import com.sun.org.apache.xerces.internal.impl.Constants;
import com.sun.org.apache.xerces.internal.xni.XMLAttributes;
import org.xml.sax.AttributeList;
import org.xml.sax.ext.Attributes2;

/**
 * Wraps {@link XMLAttributes} and makes it look like
 * {@link AttributeList} and {@link Attributes}.
 *
 * @author Arnaud Le Hors, IBM
 * @author Andy Clark, IBM
 */
public final class AttributesProxy
    implements AttributeList, Attributes2 {

  //
  // Data
  //

  /**
   * XML attributes.
   */
  private XMLAttributes fAttributes;

  //
  // Constructors
  //

  public AttributesProxy(XMLAttributes attributes) {
    fAttributes = attributes;
  }

  //
  // Public methods
  //

  /**
   * Sets the XML attributes to be wrapped.
   */
  public void setAttributes(XMLAttributes attributes) {
    fAttributes = attributes;
  } // setAttributes(XMLAttributes)

  public XMLAttributes getAttributes() {
    return fAttributes;
  }

    /*
     * Attributes methods
     */

  public int getLength() {
    return fAttributes.getLength();
  }

  public String getQName(int index) {
    return fAttributes.getQName(index);
  }

  public String getURI(int index) {
    // This hides the fact that internally we use null instead of empty string
    // SAX requires the URI to be a string or an empty string
    String uri = fAttributes.getURI(index);
    return uri != null ? uri : XMLSymbols.EMPTY_STRING;
  }

  public String getLocalName(int index) {
    return fAttributes.getLocalName(index);
  }

  public String getType(int i) {
    return fAttributes.getType(i);
  }

  public String getType(String name) {
    return fAttributes.getType(name);
  }

  public String getType(String uri, String localName) {
    return uri.equals(XMLSymbols.EMPTY_STRING) ?
        fAttributes.getType(null, localName) :
        fAttributes.getType(uri, localName);
  }

  public String getValue(int i) {
    return fAttributes.getValue(i);
  }

  public String getValue(String name) {
    return fAttributes.getValue(name);
  }

  public String getValue(String uri, String localName) {
    return uri.equals(XMLSymbols.EMPTY_STRING) ?
        fAttributes.getValue(null, localName) :
        fAttributes.getValue(uri, localName);
  }

  public int getIndex(String qName) {
    return fAttributes.getIndex(qName);
  }

  public int getIndex(String uri, String localPart) {
    return uri.equals(XMLSymbols.EMPTY_STRING) ?
        fAttributes.getIndex(null, localPart) :
        fAttributes.getIndex(uri, localPart);
  }

    /*
     * Attributes2 methods
     */

  public boolean isDeclared(int index) {
    if (index < 0 || index >= fAttributes.getLength()) {
      throw new ArrayIndexOutOfBoundsException(index);
    }
    return Boolean.TRUE.equals(
        fAttributes.getAugmentations(index).getItem(
            Constants.ATTRIBUTE_DECLARED));
  }

  public boolean isDeclared(String qName) {
    int index = getIndex(qName);
    if (index == -1) {
      throw new IllegalArgumentException(qName);
    }
    return Boolean.TRUE.equals(
        fAttributes.getAugmentations(index).getItem(
            Constants.ATTRIBUTE_DECLARED));
  }

  public boolean isDeclared(String uri, String localName) {
    int index = getIndex(uri, localName);
    if (index == -1) {
      throw new IllegalArgumentException(localName);
    }
    return Boolean.TRUE.equals(
        fAttributes.getAugmentations(index).getItem(
            Constants.ATTRIBUTE_DECLARED));
  }

  public boolean isSpecified(int index) {
    if (index < 0 || index >= fAttributes.getLength()) {
      throw new ArrayIndexOutOfBoundsException(index);
    }
    return fAttributes.isSpecified(index);
  }

  public boolean isSpecified(String qName) {
    int index = getIndex(qName);
    if (index == -1) {
      throw new IllegalArgumentException(qName);
    }
    return fAttributes.isSpecified(index);
  }

  public boolean isSpecified(String uri, String localName) {
    int index = getIndex(uri, localName);
    if (index == -1) {
      throw new IllegalArgumentException(localName);
    }
    return fAttributes.isSpecified(index);
  }

    /*
     * AttributeList methods
     */

  public String getName(int i) {
    return fAttributes.getQName(i);
  }

}
